CFC Communication Equipment Operation 4

Question 1

What is the function of CPDLC (Controller-Pilot Data Link Communications) in modern aviation?

Accepted Answer

Allows text-based digital message exchange between pilots and controllers

Answer

CPDLC enables digital text messages for routine clearances and reports, reducing voice frequency congestion especially in oceanic airspace.

Question 2

A flight crew is unable to establish contact on the assigned frequency. What is the recommended first action?

Accepted Answer

Attempt contact on the previous frequency or a published backup frequency

Answer

Before declaring an emergency, crews should try the last used frequency or sector backup frequency, as the primary may be temporarily congested or the frequency assignment may be in error.

Question 3

What does the 'guard' frequency 121.5 MHz designate in aviation?

Accepted Answer

The international aeronautical distress and emergency frequency

Answer

121.5 MHz is the international VHF emergency frequency monitored by ATC and military facilities worldwide for distress and urgency calls.

Question 4

In radiotelephony, what is the correct way to transmit the number '500'?

Accepted Answer

Five zero zero

Answer

ICAO radiotelephony standards require all digits of a number to be spoken individually, so 500 is transmitted as 'five zero zero.'

Question 5

What is the purpose of a radio 'back-up' or 'standby' communications system on commercial aircraft?

Accepted Answer

To provide an alternate means of communication if primary systems fail

Answer

Redundant communication systems ensure continued ATC contact even if the primary radio or audio panel fails.

(CFC) Certified Flight Communicator Practice Test

(CFC) Certified Flight Communicator Practice Test

CFC Communication Equipment Operation 4